Is there a way out for atonement for secretly watching pornographic websites due to fear of Allah's wrath and the erasure of good deeds?

As long as you have repented sincerely from these actions, your repentance erases the sins that preceded it. Allah accepts repentance from His servants and pardons evil deeds. No matter how great the sin, it is forgiven by sincere repentance, for Allah forgives all sins. And whoever's repentance is sound, he returns as if he had never sinned: "The one who repents from sin is like one who has no sin."